I went out and got RPGMaker2003 after reading this. I have a few comparisons:
1) The rm2K3 has a very nice look to the program, and there are a lot of resources for it. TK is still in developement, so looks come last, and since it's was originally made by one person, it was never advertised and stuff, so less ppl have it, so less resources were made.
2) In the rm2k3, you can only import certain types of files, where as in the TK, you can import almost anything!
3) The rm2k3 uses databases for storing information, the TK uses mass ammounts of separate files. The databases look good, but you can't sort them, and they are harder to manage... The TK, on the other hand, is a bit nicer in the snece that u can organize the files as you see fit.
Well, that's my 3-point comparison, lol. so... What ya think? Did I do good at all?